Mounting adapter plate



FIG. 1 is a top perspective view of a mounting adapter plate, showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a first side view thereof;

FIG. 6 is a second side view thereof;

FIG. 7 is a third side view thereof; and,

FIG. 8 is a fourth side view thereof.

The broken line in the figure drawings represents unclaimed environment only and forms no part of the claimed design. 

CLAIM The ornamental design for a mounting adapter plate, as shown and described. 